DNA and Chromosomes

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DNA and Chromosomes Target: I will be able to explain the relationship of DNA to chromosomes and genes and identify the parts of a chromosome. DNA is really large. To fit into the cell, it must coil up into chromosomes. When the DNA is coiled tightly in the nucleus, it is a chromosome. Histone: The protein that DNA coils tightly around. Chromosomes: cell structures that contain genetic information. Passed on from one generation of cells to the next. Located in the nucleus of eukaryotic cells. Pg. 93

Chromosome DNA Histone

Parts of a Chromosome: 1. Gene: A section of DNA that codes for (provides the instructions for making) a protein. 2. Chromatid: one arm of a chromosome. A double stranded chromosomes has sister chromatids that are identical. 3. Centromere: The place where sister chromatids are attached.

DNA to Chromsome

Genes Centromere Chromatid Sister Chromatids Summary:

DNA to Chromosomes Complete the worksheet and paste it in your notes so you can see the chromosome drawing below. Draw the structure of a chromosome and label all it’s parts (Centromere, Chromatid, Sister Chromatids, and Genes) Pg. 92